4. Who does more work - a man who lifts a large box from the ground up into the back of a truck, or a man who puts the same box on a trolley and wheels it up a ramp into the truck?A the man who lifts itB the man with the trolleyC they do the same work

5. A weightlifter lifts barbells of 200 Newtons above his head to a height of 2 metres. How much work does he do?A 400 NewtonsB 100 JoulesC 400 Joules

6. Energy and work use the same unit of the Joule because:A that is the unit chosen by the scientist named Pascal who studied heatB energy is required to do workC both measure the speed at which power is used